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/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd
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** All rights reserved.
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** For any questions to The Qt Company, please use contact form at http://qt.io
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**
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** This file is part of the Qt Charts module.
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**
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** Licensees holding valid commercial license for Qt may use this file in
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** accordance with the Qt License Agreement provided with the Software
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** or, alternatively, in accordance with the terms contained in a written
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** agreement between you and The Qt Company.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.io
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**
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****************************************************************************/
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#include "chartview.h"
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#include <QtGui/QMouseEvent>
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#include <QtCore/QDebug>
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#include <QtCharts/QAbstractAxis>
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#include <QtCharts/QValueAxis>
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QT_CHARTS_USE_NAMESPACE
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ChartView::ChartView(QWidget *parent)
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: QChartView(parent)
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{
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}
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//![1]
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void ChartView::keyPressEvent(QKeyEvent *event)
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{
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switch (event->key()) {
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case Qt::Key_Plus:
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chart()->zoomIn();
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break;
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case Qt::Key_Minus:
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chart()->zoomOut();
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break;
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case Qt::Key_Left:
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chart()->scroll(-1.0, 0);
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break;
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case Qt::Key_Right:
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chart()->scroll(1.0, 0);
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break;
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case Qt::Key_Up:
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chart()->scroll(0, 1.0);
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break;
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case Qt::Key_Down:
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chart()->scroll(0, -1.0);
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break;
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case Qt::Key_Space:
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switchChartType();
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break;
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default:
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QGraphicsView::keyPressEvent(event);
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break;
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}
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}
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//![1]
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//![2]
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void ChartView::switchChartType()
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{
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QChart *newChart;
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QChart *oldChart = chart();
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if (oldChart->chartType() == QChart::ChartTypeCartesian)
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newChart = new QPolarChart();
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else
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newChart = new QChart();
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// Move series and axes from old chart to new one
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QList<QAbstractSeries *> seriesList = oldChart->series();
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QList<QAbstractAxis *> axisList = oldChart->axes();
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QList<QPair<qreal, qreal> > axisRanges;
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foreach (QAbstractAxis *axis, axisList) {
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QValueAxis *valueAxis = static_cast<QValueAxis *>(axis);
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axisRanges.append(QPair<qreal, qreal>(valueAxis->min(), valueAxis->max()));
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}
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foreach (QAbstractSeries *series, seriesList)
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oldChart->removeSeries(series);
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foreach (QAbstractAxis *axis, axisList) {
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oldChart->removeAxis(axis);
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newChart->addAxis(axis, axis->alignment());
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}
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foreach (QAbstractSeries *series, seriesList) {
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newChart->addSeries(series);
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foreach (QAbstractAxis *axis, axisList)
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series->attachAxis(axis);
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}
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int count = 0;
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foreach (QAbstractAxis *axis, axisList) {
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axis->setRange(axisRanges[count].first, axisRanges[count].second);
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count++;
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}
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newChart->setTitle(oldChart->title());
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setChart(newChart);
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delete oldChart;
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}
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//![2]
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